Memory; Standard Memory - Epson NX Service Manual

Memory

The 170MB and 240MB HDD configurations for this system have 4MB of memory soldered
on the system board and one 16MB SIMM installed, for 20MB total memory. The 525MB
HDD configuration has 4MB of memory soldered on the system board and two 16MB
SIMMs installed, for 36MB total memory. The DRAM on the system board consists of eight
high-performance 512KB, 70-ns chips. The system supports 1, 4, 16, or 64MB (when
available), 70-ns SIMMs; two SIMMs may be installed for a maximum of 128MB Memory
is controlled by a custom ASIC designed by Epson that permits burst cycles from standard
DRAM. The system memory has the following features:
Standard memory includes cache and shadow RAM
ROM BIOS and CMOS RAM
Video DRAM
Zero wait state memory access
32-bit data access
LIM 4.0 EMS compatiblity.
Figure l-9 shows the system memory map.
System Description
Epson NX Sevice Manual
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